---
title: "CVE-2026-90380: Linux kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in mt76_rx_poll_complete caused by a race condition where rx_status holds a pointer to a removed STA's wcid, letting attackers cause memory corruption or kernel crash, exploit requires triggering specific race conditions."
url: https://panop.io/threat-heartbeat/CVE-2026-90380/
---

# CVE-2026-90380 Linux kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in mt76\_rx\_poll\_complete caused by a race condition where rx\_status holds a pointer to a removed STA's wcid, letting attackers cause memory corruption or kernel crash, exploit requires triggering specific race conditions.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.31% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-90380)

## Details

Type

Use After Free

Impact

Denial Of Service, Privilege Escalation

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for mt76\_rx\_poll\_complete use-after-free.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-90380](https://nvd.nist.gov/vuln/detail/CVE-2026-90380)
- [https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50](https://git.kernel.org/stable/c/217f9e7bb02558759be9d9ecfe532e9708741c50)
- [https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb](https://git.kernel.org/stable/c/aaf414bf81ab4b680580871784b0b929818188eb)
- [https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008](https://git.kernel.org/stable/c/b250943f3f8351385a17972bda001664a5c51008)
- [https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e](https://git.kernel.org/stable/c/2aa3d3b9fac9163e9226e35556607ae3f75be21e)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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